Journal
OPTICAL MATERIALS EXPRESS
Volume 6, Issue 2, Pages 312-320Publisher
OPTICAL SOC AMER
DOI: 10.1364/OME.6.000312
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Funding
- National Basic Research Program of China (973 Program) [2012CB921804]
- National Natural Science Foundation of China [61235003, 11304242, 11474078]
- Natural Science Basic Research Plan in Shaanxi Province of China [2014JQ1024]
- China Postdoctoral Science Foundation [2013M542335, 2014T70924]
- collaborative Innovation Center of Suzhou Nano Science and Technology
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Carbon nanodots (C-dots) were synthesized by femtosecond laser ablation of graphite powders in polyethylene glycol (PEG(200N)) solutions with different graphite concentrations. The photoluminescent quantum yield (PLQY) of the C-dots was effectively enhanced by decreasing the graphite concentration, and its value could reach 21%. Detailed work showed that the C-dots prepared with a low raw material concentration possessed high PLQY because they contained fewer trap defects in the carbogenic core and a larger quantity of surface functional groups on the surface. Taking advantage of their high photoluminescence properties, the C-dots were used as effective fluorescent nanosensor probes for sensitive and selective detection of Fe3+ ions. (C) 2016 Optical Society of America
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